| Pseudomorphs of marcasite, chalcopyrite, pyrite, arsenopyrite, pyrargyrite, magnetite, and quartz after pyrrhotite have been reported. |
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| Sulphide mineralization in these deposits tends to be disseminated throughout the body and is dominated by pyrrhotite and pentlandite phases. |
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| The most common ores of nickel are pentlandite, pyrrhotite, and garnierite. |
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| This rock is a dark gray schistose rock containing radiating aggregates of cummingtonite and occasionally pyrrhotite. |
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| Microcrystals of pyrrhotite, goethite, pyrite, galena, and calcite are found on the dumps. |
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| We have also seen several specimens in which pyrite has replaced a hexagonal mineral that was probably pyrrhotite. |
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| We have not yet found any unaltered material to verify that the original mineral was pyrrhotite, as claimed by Brush. |
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| Other sulfides, including pyrite, marcasite, chalcopyrite, and pyrrhotite, are occasionally found as well. |
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| The central and western United States have a similarly diverse array of pyrrhotite occurrences. |
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| Some pyrrhotite is relatively unstable in humid environments, decrepitating like pyrite. |
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| Secondary titanite, chlorite, white mica and pyrrhotite are abundant, and some samples contain metamorphic biotite. |
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| Other minerals mentioned from the mine by Dunham include galena, sphalerite, pyrite, chalcedony, and minor marcasite and pyrrhotite. |
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| Many conclude that because pyrite is cubic, pyrrhotite must be hexagonal, as it often appears. |
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| Whereas monoclinic pyrrhotite is ferrimagnetic, the hexagonal variety is antiferromagnetic. |
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| Iron and copper sulfides of this region are predominately pyrite, pyrrhotite, chalcopyrite, arsenopyrite, bornite, and marcasite. |
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| Platinum group metals are associated with disseminated to bleb-textured chalcopyrite, pyrite and pyrrhotite. |
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| Large crystals that appear to be pyrrhotite are usually hexagonal pseudomorphs of pyrite after pyrrhotite. |
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| Chromite, picotite, and magnetite also occur in dunite, as do spinel, ilmenite, pyrrhotite, and platinum in some cases. |
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| The pyroxenite host is well mineralized with disseminated pyrrhotite and chalcopyrite forming a prominent gossan. |
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| Troilite, variety of the iron sulfide mineral pyrrhotite present in meteorites. |
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| The Nadezhdinsky Works includes a flash smelter and a hydrometallurgical section to process pyrrhotite concentrates. |
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| Zones of massive sulphides may contain only small quantities of nickel if they consist primarily of pyrrhotite and pyrite. |
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| It consists primarily of pyrrhotite, with lesser quantities of pentlandite, chalcopyrite and pyrite. |
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| The Talnakh mill concentrates primarily rich ore to produce nickel and pyrrhotite concentrates. |
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| This concentration of pyrrhotite is sufficient to cause the electromagnetic anomaly. |
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| Nickel comes from the minerals pyrrhotite, pentlandite and garnierite. |
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| The skarns also contain hornblende, calcite, pyroxene, tremolite, pyrrhotite, molybdenite, galena, chalcopyrite, arsenopyrite, garnet, and pyrite. |
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| Tennantite, tetrahedrite, argentite, pyrrhotite and native gold occurred sporadically and sparingly. |
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| Orebodies in tuffaceous rocks are generally large-tonnage, irregular disseminated bodies containing essentially pyrite, pyrrhotite and arsenopyrite, with much secondary fine-grained quartz and various silicates. |
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| The mineralization observed consists of pyrrhotite, chalcopyrite, and occasional pentlandite, occurring as intercalated net-textured to semi-massive, and local massive sulphides. |
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| At Thompson, magmatic nickeliferous sulphides are predominantly composed of pyrrhotite, pentlandite, chalcopyrite, and mackinawite. |
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| The resurgence of the pyrite-chalcopyrite-gold assemblage at depth with no pyrrhotite is very significant for ongoing exploration and future potential of this area. |
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| Associated Minerals include halotrichite and pyrrhotite. |
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| The sulphidic ore consists of pyrrhotite and lesser amounts of pyrite, sphalerite, galenite, and chalcopyrite. |
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| It intersected two intervals of massive sulfides, 1.2 and 1.6 metres thick respectively, comprised of pyrite and pyrrhotite, explaining the conductor. |
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| The gold is associated with pyrite, pyrrhotite, quartz in veinlets, amphiboles and garnets. |
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| It consists into a concordant semi-massive to massive sulfides lens underlain by a tectonically transposed stockwork feeder zone containing pyrrhotite, pyrite, chalcopyrite and arsenopyrite millimetric stringers. |
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| The Zone 3 consists of a system of quartz veins mineralized in gold, pyrite, with some pyrrhotite and magnetite in an andesitic environment including some iron formations. |
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| The gold mineralization is associated with pyrite and pyrrhotite and varies from fine-grained disseminated to blebby coarse-grained. |
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| The sulphide minerals consist of varying proportions of pyrite, pyrrhotite and sphalerite with lesser galena, arsenopyrite and chalcopyrite. |
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| The six diamond drill holes totalling 1,448 metres intersected conductive units, usually consisting of argillite with various amounts of pyrite and pyrrhotite as well as traces of chalcopyrite, sphalerite and galena. |
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| The EM conductors, at least the stronger ones, are very likely due to sulfides, one of which is probably pyrrhotite. |
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| Many igneous rocks also contain the sulfide minerals pyrrhotite and pentlandite. |
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| Mineralization at Perkoa consists of a massive pyrite, sphalerite, pyrrhotite, baryte ore, with small amounts of lead and copper sulphides. |
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| The principal minerals in the auriferous deposits are pyrite, galena, chalcopyrite, sphalerite, cosalite, bismuthinite, arsenopyrite, pyrrhotite, scheelite and free gold. |
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| The deposit hosts gold, pyrite, pyrrhotite, arsenopyrite, antimonite. |
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| Within the deeper diorite unit, some intense sericite alteration was observed with arsenopyrite, pyrite and pyrrhotite, generally as selvedges to quartz veins. |
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| It was determined that the geophysical anomaly was caused by sheared, disseminated pyrrhotite, with no significant gold values and only slightly elevated base metal values. |
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